| # SPDX-License-Identifier: GPL-2.0 |
| |
| config BTRFS_FS |
| tristate "Btrfs filesystem support" |
| select BLK_CGROUP_PUNT_BIO |
| select CRC32 |
| select CRYPTO |
| select CRYPTO_CRC32C |
| select CRYPTO_XXHASH |
| select CRYPTO_SHA256 |
| select CRYPTO_BLAKE2B |
| select ZLIB_INFLATE |
| select ZLIB_DEFLATE |
| select LZO_COMPRESS |
| select LZO_DECOMPRESS |
| select ZSTD_COMPRESS |
| select ZSTD_DECOMPRESS |
| select FS_IOMAP |
| select RAID6_PQ |
| select XOR_BLOCKS |
| depends on PAGE_SIZE_LESS_THAN_256KB |
| |
| help |
| Btrfs is a general purpose copy-on-write filesystem with extents, |
| writable snapshotting, support for multiple devices and many more |
| features focused on fault tolerance, repair and easy administration. |
| |
| The filesystem disk format is no longer unstable, and it's not |
| expected to change unless there are strong reasons to do so. If there |
| is a format change, file systems with a unchanged format will |
| continue to be mountable and usable by newer kernels. |
| |
| For more information, please see the web pages at |
| https://btrfs.readthedocs.io |
| |
| To compile this file system support as a module, choose M here. The |
| module will be called btrfs. |
| |
| If unsure, say N. |
| |
| config BTRFS_FS_POSIX_ACL |
| bool "Btrfs POSIX Access Control Lists" |
| depends on BTRFS_FS |
| select FS_POSIX_ACL |
| help |
| POSIX Access Control Lists (ACLs) support permissions for users and |
| groups beyond the owner/group/world scheme. |
| |
| If you don't know what Access Control Lists are, say N |
| |
| config BTRFS_FS_RUN_SANITY_TESTS |
| bool "Btrfs will run sanity tests upon loading" |
| depends on BTRFS_FS |
| help |
| This will run sanity tests for core functionality like free space, |
| extent maps, extent io, extent buffers, inodes, qgroups and others, |
| at module load time. These are mostly regression tests and are only |
| interesting to developers. |
| |
| If unsure, say N. |
| |
| config BTRFS_DEBUG |
| bool "Btrfs debugging support" |
| depends on BTRFS_FS |
| select REF_TRACKER if STACKTRACE_SUPPORT |
| help |
| Enable run-time debugging support for the btrfs filesystem. |
| |
| Additional potentially expensive checks, debugging functionality or |
| sysfs exported information is enabled, like leak checks of internal |
| objects, optional forced space fragmentation and /sys/fs/btrfs/debug . |
| This has negative impact on performance. |
| |
| If unsure, say N. |
| |
| config BTRFS_ASSERT |
| bool "Btrfs assert support" |
| depends on BTRFS_FS |
| help |
| Enable run-time assertion checking. Additional safety checks are |
| done, simple enough not to affect performance but verify invariants |
| and assumptions of code to run properly. This may result in panics, |
| and is meant for developers but can be enabled in general. |
| |
| If unsure, say N. |
| |
| config BTRFS_EXPERIMENTAL |
| bool "Btrfs experimental features" |
| depends on BTRFS_FS |
| default n |
| help |
| Enable experimental features. These features may not be stable enough |
| for end users. This is meant for btrfs developers or users who wish |
| to test the functionality and report problems. |
| |
| Current list: |
| |
| - COW fixup worker warning - last warning before removing the |
| functionality catching out-of-band page |
| dirtying, not necessary since 5.8 |
| |
| - RAID mirror read policy - additional read policies for balancing |
| reading from redundant block group |
| profiles (currently: pid, round-robin, |
| fixed devid) |
| |
| - send stream protocol v3 - fs-verity support |
| |
| - checksum offload mode - sysfs knob to affect when checksums are |
| calculated (at IO time, or in a thread) |
| |
| - raid-stripe-tree - additional mapping of extents to devices to |
| support RAID1* profiles on zoned devices, |
| RAID56 not yet supported |
| |
| - extent tree v2 - complex rework of extent tracking |
| |
| - large folio support |
| |
| If unsure, say N. |
